Blagodat/OknaFunciy/AddZakazWindow.axaml.cs

using Avalonia.Controls;
using Avalonia.Interactivity;
using Demka_Snova_1.Hardik.Conect;
using Demka_Snova_1.Hardik.Conect.Dao;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Demka_Snova_1.OknaFunciy;

public partial class AddZakazWindow : Window
{
    private static int nextId = 50;
    private List<ordersDao> ordersList;
    private Random random = new Random();

    public AddZakazWindow()
    {
        InitializeComponent();
        LoadOrders();
    }

    private void LoadOrders()
    {
        using (var db = new DatabaseConnection())
        {
            ordersList = db.GetAllOrders();
            nextId = ordersList.Count > 0 ? ordersList.Max(o => o.ID) + 1 : 50;
        }
    }

    private void FormatZakaz_Click(object sender, RoutedEventArgs e)
    {
        string client = ClientTextBox.Text;
        string usluga = UslugaTextBox.Text;

        if (!decimal.TryParse(ProkatTextBox.Text, out decimal prokat))
        {
            ShowError("Некорректное значение для проката.");
            return;
        }

        var order = new ordersDao
        {
            ID = nextId++,
            CodeZakaz = $"{random.Next(10000, 99999)}.{random.Next(10000, 99999)}",
            Date = DateOnly.FromDateTime(DateTime.Now),
            Time = TimeOnly.FromDateTime(DateTime.Now),
            CodeClient = client,
            Usluga = usluga,
            Status = "Новый",
            DateClose = null,
            Prokat = prokat
        };

        ordersList.Add(order);
    }

    private void Exitka(object sender, RoutedEventArgs e)
    {
        new MainWindow().Show();
        this.Close();
    }

    private async void ShowError(string message)
    {
        var dialog = new Window
        {
            Title = "Ошибка",
            Content = message,
            Width = 300,
            Height = 200
        };
        await dialog.ShowDialog(this);
    }
}